I agree. I’m also using the Apple Watch on the beta, and that is functioning perfectly too. I installed both when Beta 6 came out and I’ve yet to have any bugs pop up.
My battery life on both the 17 Pro Max and the Apple Watch 10 is comparable to how it was before I installed the beta, that is, very good indeed, under heavy usage
I have an Apple Watch 11 and am tempted to install the newest beta (my iPhone, Apple TV, and HomePods are all on 27), but I keep seeing people say the battery life isn’t great (albeit not terrible) on the new watch beta so that’s keeping me away. Latest build is an “a” build, I believe.